Intention behind this notch feature in Custom Face-Seal Static Gasket

[Setty98]

I found this interesting feature in the gasket of a battery pack. The notch seems to be on the inner side of the gasket, which I guess is used to prevent the gasket from squeezing out under compression.
Could there be any other intention behind this feature?


I am implementing a gasket to seal my enclosure and wanted to know the benefit of the above feature. If it is useful, I would probably implement it.


Regards,
Nikhil Setty

 

[3DDave]

It looks intended to keep the gasket in place if that part is flipped over before assembly as well at to make up for any distortion that might mislocate the holes.

 

[hydtools]

Looks like a retaining feature for the gasket, intended to keep the gasket in its proper location.

Ted